Handle Boto Throttling errors in describe_environments
Handle Boto Throttling errors in describe_environments

Adapted from wrap_aws_rate_limited_call in
https://github.com/Netflix/security_monkey/blob/develop/security_monkey/watcher.py

Probably many more AWS calls should be handled this way
but I was specifically hitting a problem with the loop
that polls describe_environments

cookbrite/ebs-deploy